How much does a 5.00ct+ E SI1 natural princess diamond cost?

As of September 2026, 5.00ct+ E SI1 natural princess diamonds typically cost $99,920 AUD to $323,472 AUD, with a median price of $166,328 AUD. There are currently 13 diamonds matching this specification available across retailers.

Where can I find the best price on a E SI1 princess diamond?

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5.00ct+ E SI1 Natural Princess

Quick answer

As of September 2026, there are 13 natural princess diamonds with E colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $99,920 AUD to $323,472 AUD, with a median of $166,328 AUD. At least 23 retailers stock this exact specification. Half of all listings fall between $30,565 AUD and $36,218 AUD per carat. The same specification in lab grown form lists at a median of about $336 AUD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Princess natural stones in the index: 2,073 USD per carat, -3.2% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

$90,922 AUD

Highest Price

$363,334 AUD

Average Price

$178,971 AUD

Market Intelligence

Retailers Selling

Price Spread

16.8%

Price Range

Price per carat distribution across retailers

$23,938/ct

10th Percentile

$15,140

Median

$23,938

90th Percentile

$27,001

Score Distribution

13 diamonds scored across 4 quality tiers

Excellent

2 (15.4%)

Very Good

5 (38.5%)

Good

3 (23.1%)

Average

3 (23.1%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

F SI1F colour is visually identical to E to the naked eye

Save 23%

Lab-Grown E SI1Same specifications, lab-grown origin

Save 99%

Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1